Dust-collector.



F. X. WAHL.

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' THE coLuMam rMNoaRAPH co., WASHING-HSN. n. c.

UNITED s'rxfrns rx4 DUST-COLLECTOR.

Specification of Letters Patent.

Patented June 13, 1916.

Application led .Tune 17, 1915. Serial No. 34,674.

To all 'whom t may concern Be it known that I, FRANK X. WAHL, a citizenof the United States, and a resident of the city of Chicago, county ofCook, and State of Illinois, have invented certain new and usefulImprovements in- Dust-Collec-l tors, of which the following is 'aspeciiication.

Myl invention relates to improvements in dust collectors especiallyadapted for use by jewelers, the object of the invention being toprovide a simple and efficient means for' collecting and saving all dustof valuable metals, such as gold, platinum, silver and the like,employed in jewelry.

The invention consists in the combinations and arrangements of partshereinafter described and claimed.

The invention will be best understood by reference to the accompanyingdrawing forming a part of this specification, and in which,

Figure 1 is a vertical section of a device embodying my invention, andFig. 2, a horizontal section of the same taken substantially on line4 22 of Fig. 1, with parts removed.

The preferred form of construction, as illustrated in the drawingcomprises a collecting tank 3 adapted to contain water and provided witha removable cover in the form of a shallow sink 4 having a trapped drain5 leading into said tank and by means of which water will automaticallydrain from said sink into said tank, but the admission of air ,theretowill be prevented. The upper portion of tank 3 is provided with aplurality of transverse partitions 6 dividing the same into a vpluralityof air compartments 7,' said partitions extending but part way to thebottom of the tank, the lower portion of said tank being filled withwater to form a common water seal for the bottoms of compartments 7,thus hermetically separating said compartments from each other. An inletpipe 8 leads into the first compartment 7 at the right, as shown, and isturned downwardly and provided with a divergent discharge end 9 adaptedto project a spreading current of air on the top of the water in thebottom of tank 3. An air conduit 8 is connected with inlet pipe 8, saidconduit leading to the different 4buiiing and polishing machines andserving to direct the air collected from said machines into the` device,as will be readily understood. A downwardly turned air pipe 10 connectseach 'of the compartments 7 with its adjoining compartment, each of saidpipes being provided with a downwardly divergentdischargeend 11 adaptedtodirect a spreading current. of.air onto the top of the water inthebottom of tank 3, and said pipes being arranged in staggered relation,as indicated in Fig. 2, so as to cause the air to travel tortuouslythrough saidv compartments. At the discharge end of the apparatus an airfiltering compartment 12 is formed and filled with wet excelsior, apassage13 leading from'the adjoining compartment 7 into said compartment12 and an air discharge pipe 14 also leading therefrom. An overfiow pipe15 is provided for the water seal in the bottom of tank 3 in position tomaintain the level of said water seal slightly abovethe lower ends ofpartitions 6, as indicated. Overflow pipe 15 discharges into a removablefelt .filter 16 and a stop cock'17 is provided for withdrawing thefiltered water from the apparatus.

In use, the pipe 14 is connected with an exhaust fan and pipe 8 with theusual buiiing, polishing or similar machines in a jewelryl shop. By thisarrangement the air drawn from such machines, with the valuable dustcontained therein, will be subjected to a tortuous passage through theapparatus and will repeatedly be directed downwardly against the surfaceof the water seal in tank 3, being finally filtered through the wetexcelsior 12 before passing to the exhaust fan, thus edectually removingall solid .particles from said air and preserving the same in theapparatus. Likewise the overflow from tank 3 will be filtered and anysolid particles retained in said filter. j

The sink 4 is providedso that the different articles of jewelry may bewashed or scrubbed over said sink and the jewelers may wash their handstherein so that the dust of the valuable metals therefrom may becollected in tank 3. At suitable intervals the water lfrom tank 3, theasbestos from compartment 12 and the filter 16 will be removed andtreated for the recovery of the y valuable metals contained therein, aswill be readily understood. 4

While I have illustrated and described the preferred form ofconstruction for carrying my invention into eiiiect, this is capable ofVariation and modification withoutl departing from the spirit of theinvert tion. I, therefore, do not Wish to be limited to the precisedetails of construction set forth, but desire to avail myself of suchVariations and modifications as come within the scope of the appendedclaims.

Having described my invention what I claim as new and desire to secureby Letters Patent is:

l. A device of the class described comprising a collecting tank; a coverfor said tank in the form of a sink having a trapped drain leading intosaid tank; means for drawing air through said tank; and dust lcollectingmeans in said tank; substantially prising a collecti-ng tank; acoveri''or said tank in the form of a removable sink having a trappeddrain leading into said tank; means for drawing air through said tank;and dust collecting means in said tank, substantially as described.

In testimony whereof I have signed my name to this specification inthepresence of two subscribing witnesses.

FRANK `X. WAHL.

Witnesses:

JOSHUA R. H. Po'rrs, HELEN F. LILLIS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G."

